article{
    position: relative;
}
h1{
    height: 50px;
    margin: 0;
}
canvas{
    border: 1px solid ;
}
div{
    height: 40px;
    display: flex;
    align-items: center;
}
span{
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 1px solid;
    margin: 0 5px;
}
span:nth-of-type(1){
    background-color: black;
}
span:nth-of-type(2){
    background-color: skyblue;
}
span:nth-of-type(3){
    background-color: yellowgreen;
}
span:nth-of-type(4){
    background-color: tomato;
}
span:nth-of-type(5){
    background-color: yellow;
}
span:nth-of-type(6){
    background-color: white;
}
.check{
    box-shadow: 0 0 5px red;
}

p{
    width: 20px;
    height: 20px;
    border: 1px solid;
    border-radius: 50%;
    position: absolute;
    background-color: white;
    display: none;
}